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1. (WO2018079877) IMAGE PROCESSING DEVICE AND METHOD FOR COMPRESSING DYNAMIC RANGE OF WIDE-RANGE IMAGE

Pub. No.:    WO/2018/079877    International Application No.:    PCT/KR2016/012159
Publication Date: Fri May 04 01:59:59 CEST 2018 International Filing Date: Fri Oct 28 01:59:59 CEST 2016
IPC: G06T 5/00
G06T 5/40
G06T 5/50
H04N 5/355
H04N 5/335
Applicants: HANWHA TECHWIN CO., LTD.
한화테크윈 주식회사
Inventors: LEE, Chang Min
이창민
Title: IMAGE PROCESSING DEVICE AND METHOD FOR COMPRESSING DYNAMIC RANGE OF WIDE-RANGE IMAGE
Abstract:
An image processing device comprises: a WDR image sensor photographing a subject and outputting image frames; a wide-range image synthesizing unit for synthesizing a wide-range image frame by synthesizing n number of sub-channels included in each of the image frames; a knee curve generation unit for calculating an integrated histogram from luminance levels of a total m×n number of sub-channels included in m number of image frames among the image frames and generating a knee curve from the integrated histogram; and a dynamic range conversion unit for reducing the dynamic range of the synthesized wide-range image by using the generated knee curve.